1. It's very appealing - what is it?
2. Doesn't do much for me, but I think technically you did what you set out to, which is positive. I want more flower, less dog. The dog, which takes up the bulk of the frame adds very little, if anything to the image, IMO.
3. Fireworks are difficult to shoot well and these are out of focus.
4. I like this one - very nice...sharp, good contrast.
5. This one is nice enough, but consider straightening out the horizon. Also, your person, at first glance, looks headless, at least to me. I'd like to see more contrast between the water and the dock - adding the color back might accomplish that; I'm not sure the sepia tone works as well as you want it to.